Upsilon

Up"si*lon

(?),
n. [Gr. 'y^ psilo`n bare, mere, simple
y.] The 20th letter (, ) of the Greek alphabet, a vowel having originally the sound of as in room, becoming before the 4th century
b. c. that French
u or Ger.
. Its equivalent in English is
u or
y.
[Webster 1913 Suppl.]

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